Combat: ability archetype byte (MC-6 dispatch spike)

byte Archetype on AbilityDefBlob (AbilityArchetype enum: Projectile/Hitscan/Cone/Aoe), authored on AbilityDefinition + baked in AbilityDatabaseAuthoring, read at dispatch in AbilityFireSystem -- NOT folded through EffectiveAbilityStats/StatRecomputeSystem (static identity, not a tunable stat; MC-4 review BURST-1). All current abilities are Projectile (0) -> zero behaviour change; the dispatch read-point is the de-risk spike for MC-6 hitscan/cone/aoe.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Project/Scripts/Simulation/Combat/AbilityDatabaseBlob.cs

@@ -3,10 +3,21 @@ using Unity.Entities;
 
 namespace ProjectM.Simulation
 {
+    /// <summary>Ability KIND for the AbilityFireSystem dispatch (MC-4 spike for MC-6). Backed by <c>byte</c> so the
+    /// baked blob stores a byte (the Burst cross-assembly enum rule); the runtime switch compares the byte value.</summary>
+    public enum AbilityArchetype : byte
+    {
+        Projectile = 0, // today's path: spawn a projectile ghost
+        Hitscan = 1,    // MC-6
+        Cone = 2,       // MC-6 (melee-style cone via the ability system)
+        Aoe = 3,        // MC-6
+    }
+
     /// <summary>One authored ability definition, baked immutable into the AbilityDatabase blob.</summary>
     public struct AbilityDefBlob
     {
         public byte Id; // AbilityId
+        public byte Archetype; // AbilityArchetype (0 = Projectile); read at dispatch in AbilityFireSystem (MC-6 spike)
         public float Damage;
         public float ProjectileSpeed;
         public float Range;

Assets/_Project/Scripts/Simulation/Combat/AbilityFireSystem.cs

@@ -60,6 +60,7 @@ namespace ProjectM.Simulation
             // Per-ability projectile ghost prefabs live on the AbilityDatabase singleton's companion buffer.
             var dbEntity = SystemAPI.GetSingletonEntity<AbilityDatabase>();
             var abilityPrefabs = SystemAPI.GetBuffer<AbilityPrefabElement>(dbEntity);
+            var abilityDb = SystemAPI.GetSingleton<AbilityDatabase>();
 
             bool isServer = state.WorldUnmanaged.IsServer();
 
@@ -99,6 +100,14 @@ namespace ProjectM.Simulation
                         continue; // still cooling down
                 }
 
+                // MC-4 spike for MC-6: dispatch on the authored ability ARCHETYPE byte (baked in the blob, read here -- NOT
+                // folded through EffectiveAbilityStats; it is static identity, not a tunable stat). All current
+                // abilities are Projectile (0); hitscan/cone/aoe archetypes plug in at this point in MC-6.
+                ref var adb = ref abilityDb.Value.Value;
+                byte archetype = adb.TryGetAbility(abilityRef.ValueRO.Id, out var adef) ? adef.Archetype : (byte)AbilityArchetype.Projectile;
+                if (archetype != (byte)AbilityArchetype.Projectile)
+                    continue;
+
                 // Resolve the projectile ghost prefab for this player's selected ability id.
                 Entity prefab = Entity.Null;
                 for (int i = 0; i < abilityPrefabs.Length; i++)